Portable hand-operated cutting device



Aug. 14, 1945. J. J. OTTO 2,382,021

PORTABLE HAND-OPERATED CUTTING DEVICE Filed Jan. 15, 1945 2 Sheets-Sheet l Inuent'or JOE I one Aug. 14, 1945. J, 0110 PORTABLE HAND-OPERATED CUTTING DEVICE Filed Jan. 15, 1945 2 Sheets-Sheet 2 Mummy Inventor By r all Patented Aug. 14, 1945 PoItTAiQiJE-HAnD-OPERATED CUTTlNG DEVIC 6; J1ottojseattleiwasli. N I Application January'15, 1945, Serial' No.572,'864 an 4 claims; (Cl.164-- 73) 'Ihisjinvention rel-ates to'jwh'at isbelieved to be an- 'impr oved' cutting device, I one? which'is characterized by" :ititih strl'1ctural features of refinement and novel phases; the complete arrangement constituting a light weight, portable structure whiehlends itself admirably well for cutting holes and SIOtS'in 'InetaI boxes and cabi'nets; for example, rectangular hole's'andslots.

T have discovered the need for a feasibleand pra'c'fihable'cutting-"device of the i aforementioned type'in the electric shop'of 'tlie plant'in'which I am" employed, in which there "is a constant need for 7 cutting holes,;that 'is'; retan'gularfhbl'es and slots;- electrical ceb net's'; Tlfierefref-the prima ry" Object, as" Eliot/e" indicated; is {the provision of a cutting devic'e to aceoniplishf the resultsbr'iefli stated; the"dvioebein 'sucli as to serve-" many andellother lines of endeavor in 'whicH-it will doubtles's'b-foiind satisfactorily sable.

Briefly, the preferred embodiment of the in vention comprises a pair of-longitiidinallyjspaced parallel 'end 'plates', these adapted to" coact with the cabinet or other arttome, cut], 'said pl-ates serving"; as 'pr'opr accoininodat ion support for 1 horizontal parallel rods, and said rods'servinito accommodate a "longitudinally shiftabl carriage, the latter rovided" WithQthe" clitti g 11001 and sc'1'ew je;cl' means for engaging" and disengaging meteor h H I Qthe'r'i features and "advantages will? become more readily apparent pp the if ollow'ing" de'; scriptiona'n'd th accompanying illustrative drawings. I l

Re'flring" 5 new} to the drawings, wherein like nur'nerals' ai'efernployed to designate'flike'parts' thi'dughoiittheview'sz r, j Figfir l'is atopplanview-b i} a spec'ial cabin et cuttr constriicted in accordance witli'my' ideas, the heindfcraiik' 'at the "right "in Figure 2 bingfl 'rest'ficted;

Figure 2is a"sid"elevatidnal view of a fr ag meme iy or contracted typejshowing the comletef c'ieyice'mireag iiiessjrogse;

eete -item, A e iei el ing reference numerals, and first to Figure 2, it

will be seenthat the aforementioned spaced par- 6' shown) or other work to be out. L-shaped or,

angle-type r'ubber or equivalent'cushions I are, used to providea suitably c'ushioneiiland'efiecti've. clamping of the plates'in place. This clampingaction is achieved by e feed-screw} Whose' left hand'end is threadedthrough a screw-threaded hole in the plate 5. The oppositeendis providedwith shoulder flanges! with a journal l0 therebetween to provide a desired turntable operating. connection; with the plate-4. This endof the feed screw-isprovided with'asuitable hand-crank li for' conveniently" adjusting the plates 4 and 5 towardand fr o'rn each ther to fit the'J'ob to be undertaken; I

' I- nowdirdtttttntibritdthe cylindrical hori- 'zontal "guidf'ro'd' [2," therefbing a pair or suchu rods and 'th'es'e 'being screw-threaded and provided with'clainpi-nghuts at one end." I The nut equipped ends" of: these rods, as indicatedgenerally by thefnumerar 13; are clamped in the upper part of the plate 4; The opposite ends have-slid ing eoa'ction with smooth-walled holes 14 in the upper 'end portion of thedplate 5. It is to be ob served that the fee'd 'screw 8'is almost directly beneath one of jth'ese rods 12. Thus, we have, if

desired; a single fee'd'fscrew to" work the platesback-and fdrth an obvious manner, Of 'course, the'plate 5"i's actuallv'the movablef'plate, since this] is adjusted "toward and ifrom the relatively stationary one 4.1 p p v I next; call attention tofthe cutter-equipped shift'able carriage generally denoted 9 the g'u're BQ This comprisesa hori' 5?? 1 .1 H .l H zon'tal carriage" and shifter plate l6 which stretches "across and extends beyond theguide rods l 2, Theexteriding end portions are provided with parallelifguide barrels '.I 'I wl 1i h slide back and forth on the es 2.,1 Said end port-ions are also provided with: suitable outstanding lhand;

grips 1 8, The linterniediateportion oithe plate ishprovided with cylindrical holes "19. Q'I'he .left hand endpo'rtion of the plate i'sprovided with an. .upstanding internally .screw threaded collar 20;

this to accommodate the adjusting screw 2 I. .The

upper l end. of said screw. is provided with fine threads and withan appropriate head 22 to'facilitate turning thereof. The lower end of the screw is swivelly connected in; any; suitable manner,- as

lelism beneath the main cross-platel 6. This particular plate 24 is provided with upstanding guide ndiq te t ztww xoneeend of t e hb z n al v ada termlateiMwThe ;=-1atter 1is,in=spaic d paralam modate the steel cutting tool 26, this held in place by set screw retained collars 21.

Stop rings 28 and 29 are provided on the end portions of the guide rods l2 to limit the backand-forth or reciprocatory travel of said tool carriage.

' As before stated, the coacting features 6 and I provide effective grips and these clamp over the adjacent portions of the cabinet in which the cutting step is to be performed. The adjustment of the plates 4 and 5 to accommodate this is accomplished by the feed screw 8, crank II and properly arranged connections between the feed screw and plates. with the guide rods l2, form an open type framework for the carriage. The carriage is therefore readily shiftable back and forth on the guide rods The feed screw and plates, together.

l2, this through the medium of the'conveniently on micrometer adjusting screws. Thus finely reg-,

ulated adjustments of the cutting points canbe had. By contrast, the feed screw is provided with coarse threads, this so that quick adjustment of the device on the job may be readily attained.

Explaining the operation, here is how the device I cuts. Let us assume that we have a piece of steel two feet long and eighteen inches wide and we want to cut a holein it ten inches long and four inches wide; The machine would be set up on this piece of steel with the cutting tool directly over the desired location for one-side of the hole and the stops would be set for the ten inch length of the hole. The carriage would now be pushed back and forth, and the cutting tool lowered alittle deeper into the out each time it is pushed until it cuts through the piece of steel. chine would now be moved over four inches and the other side of the hole cut in like manner. Now, the machine would be turned around crossways on the piece of steel with the cutting point directly over end of the hole. 29 would again be set, this time for the four inch cut and this end of the hole would be cut as before.

The ma- The stops 28 and justing and clamping screw mounted in said plates to clamp same on'the work, a pair of horizontal parallel guide rods also mounted in said plates, a carriage located between said plates and shiftably mounted on said guide rods, a cutting tool,

an adapter carrying said cutting tool, and a screw I clamped against opposite sides of the plate to hold I the rods in place, the lower inner surface of said plate being provided with an outstanding flange providing a supporting ledge, a feed screw journaled for rotation in the lower portion of said plate, a hand crank on one end of said feedscrew, a second plate opposed in parallelism to the firstnamed plate, said second plate being provided at its bottom with a ledge flange, the bottom portion being provided with a screw-threaded hole and said feed screw being threaded through said hole, the upper portion of said plate being provided with smooth walled guide openings and said guide rods extending slidably th'rough said guide openings.

3. In a frameworksupport for a tool-equipped carriage of the class described, arelaitively stationary end plate, said end plate being provided at its top with apertures, a pair of. guide rods having threaded ends passing through said apertures,

' clamping nuts on the threaded endsand clamped against opposite sides of the plate to hold the rods in place, the lower inner surfaceof said plate being provided with. an outstanding flange p'ro-. viding a supporting ledge, a feed screw J'ournaled I 40 for rotation in the lower portion of said plate, a

Finally, the machine would be moved to the other end of the hole and this-would be cut in like manner.

A careful consideration of the foregoing description in conjunction with the invention as illustrated in the, drawings will enable the reader to obtain a clear understanding and impression gof the alleged features of merit and novelty sufficient to clarify the construction of the invention as hereinafter claimed.

Minor changes in shape, size, materials and hand, crankon one end of said feed screw, a second plate opposed in parallelism to the 'firstnamed plate, said secondpla-te being provided at the upper portion of said plate being provided with smooth walled guide openings, and said guide rods extending slidably through said guide openings, and a carriage unit, said um't being provided with guide barrels slidable on said guide rods,

said carriage being provided with adjustable cutter means.

4. As a component part of a portable cutter of the class described, a carriage plate provided at opposite ends with hand-grips, provided inwardly of said ends with guide barrels, said plat being further provided with guide pin hole and a screw threaded collar, an adjusting screw threaded through said collar, an adapter plate in parallelism beneaththeintermediate portion of said first-named plate, said adapter plate having swivel connection with the lowerend of said ad-.

justing screw, said adapter plate being; furth'er provided with. upstanding guide pins extending through the guide pin holes in said carriage plate,

and a detachable and adjustablecutting rtool carried by said adapter plate. JOE J. OI'I'O. 

